Furnace radiator



Aug. 2, 1932. o. P. NvsTRoM ETAL FURNACE RADIATOR Filed April '7. 195o l g CHECK /3 I f'l'h Patented Aug. 2, 1932 UNITED STATES l,dt9,709

Pafiialai OFFICE OSCAR P.'NYSTRO1V[ AND GERRIT JAARDA, OF {HOLLAND} MICGAN, ASSIG-NORS TO HOLLAND FUR/NACE COMPANY, vOIE HOLLAND, MICHGAN, A CORPORATION MICHIGAN v FURNACE RADIATOR Application lcd April 7,

This invention relates to furnaces and is `more particularly concerned with novel improvements in the radiator for warm air furnaces, with which: an automatic damper is used, as shown in the prior Patent No'. 1,211,600 issued January 9, 1917 to August H.V Landwehr. type shown in saidprior patent are each `equipped with a radiator located abovev and in .communication with the combustion chamber ,of the furnace wherein the `fuel is burned. The products of combustion at a very high degree of temperature are normally compelled to'circulatezthrough the radiator the entire length thereof and pass therefrom to the smoke pipe or flue and thence to the chimney. It is desirable, however, that when the door ofthe furnace .at the front is Vopened for the introduction of new fuel that, during the time the door is open and fresh fuel placed on the fire with a consequent immediate production of heavy smoke, that this smoke shall not be compelled to traverse the radiator butmay pass substantially instantly from the combustion chamber to the smoke pipe. This is automatically effected through a damper mounted in the radiator and. which is connected for operation with theire door of the furnace, the damper being automatically opened when the fire door is opened whereby theheavy smoke produced on introducing fresh fuel onto the 'burning fuel has a free passage to the smoke pipe and does not have tocirculate through the radiator, there- `by obviating in a large measure depositfof soot in the radiator and also obviating back vpressure which would cause the smoke and gases produced when fresh fuel is put on the fire from passing outwardly at the front (tihrough the opening uncovered by the fire oor. Y f

The earlier patent to Landwehr, above noted, secures these results in a fairly effective manner but the structure shown therein is open to several objections. For instance,

Warm air furnaces of the 1930. Serial No. 442,144.

the mounting rod of the damper has a mounting on projections which extend into the outlet of the radiator which causes some obstruction to the outlet and holds down the eiiiciencyof thefurnace in the matterofrapidly passing the heavy smoke and other gases which are produced when fresh fuel is fed to the fire. Also, the outer side ofthe radiator outlet is smoothand the smoke and flue pipe connected thereto and which leads to the chimney can changeposition on the outlet and hence is liable to turn thereon and engage with the damper weight lever and interfere with its proper easy opera-tion. In addition, a special opening must be cut through the smoke or flue pipe for the passage of the damper rod weight lever and air passes through this opening which acts as a check and interference to some degree with the draft of the furn ace.l

kThe present invention is concerned with very valuable and practical improvements in construction which obviate all of such defects present in the former construction.

An understanding of the invention and the construction which has been'produced embodying the same may be had from the following description, takenin connection with the accompanying drawing, in which,

Fig. 1 is a partial side elevation and vertical section at the upper end of the figure of a warmV ai rV furnace equipped with our invention.

Fig. 2 is an enlarged 'horizontall section ztaken on the planeof the horizontal center line'of'the radiator of the furnace.

Fig. 3 is a fragmentary vertical section taken substantially on the pla-ne of line 3 3 of Fig. 2 and looking in the direction indicated by the arrows, and Y Fig. i is a fragmentary enlarged side elevation of the outlet portion of the radiator and showing the smoke or flue pipe `connected to said outlet, the body of the radiator being illustrated in vertical section.

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Like reference characters refer to like parts in the different figures of the drawing.

/Vithin the furnace outer casing 1 the heating structure of the furnace is located, including a combustion chamber 2, above which the outer annular circular body 8 of the radiator is located which, together` with the center dome 4, the connecting flue or passage between it and the body 3, the outlet 6 and the front clean-out entrance member 7 are all formed integrally in a single casting. It is of course to be understood that below the combustion chamber 2 within the'outer casting is a fire pot into which the fuel descends for burning above a grate, and that below the fire pot and grate is the usual ash pit, all of which, however, are of common conven.- tional and well known construction and need not be illustrated' or described herein for an understanding of the present invention.

The center dome 4L of the radiator connects and has communication with the combustion chamber 2 at the upper end so that products of combustion may pass through the flue 5 directly to the radiator body 3 which is of annular circular form, as shown, and of relatively large size so as to lill a large part of the upper end portion of the casing 1. rl"he outlet 6 to the radiator is located a short distance from the iiue 5 only far enough so that the damper mentioned may be mounted between their adjacent ends. The clean out at 7 is disposed substantially opposite where the damper is located.

ln the construction of the outlet 6, at one side thereof a horizontal outwardly extending lug 8 of metal is integrally cast which, preferably, at its inner side, is cored out at 9. The damper 10 within the radiator is carried at the inner end of a damper rod 11 which extends through the lug 8 and is rotatably mounted therein and is equipped at its i outer .end with a. weighted lever 12. A lightchain 13 extends from the outer end of the lever 12 to the lat-ch for the fire door of the furnace being guided through passage over suitable pulleys. Normally the fire door is closed and when the same is closed' the chain 13 is drawn over the pulleys so as to lift the lever 12 and turn the damper 10 to bring its upper edge portion against a stop lug v14s cast with the radiator body 3 as shown in F ig. 3. When the fire door latch is operated to open the door the tension on the chain 13 .'1. is removed and the chain slackened, whereupon through gravity the weight of the lever 12 turns the damper to a'horizontal position. The section of the flue or pipe 15 which connects with the outlet 6 is slotted for a short distance atone end to embrace the lug 8 as best shown in Fig. 4. Inasmuch as the entire lever 12 is outside of the smoke pipe section 15 there is no necessity of providing an open- I ing through the smoke pipe for the pass ue of the inner Vend portion of the lever and therefore no opening for the entrance of air into the smoke pipe'is made.

r1`he construction described is particularly practical and effective to obviate the objections in the earlier construction as shown in the patent to Landwehr. There is no diminution of the cross sectional area of the outlet 6 to the radiator by reason of any lugs or other obstructions extending thereinto for mounting the damper rod. T he damper rod lever is wholly outside of the smoke pipe and no check on the draft in the furnace is made through any opening through the smoke pipe required for the passage of the lever. The smoke pipe is held against any turning movement on the radiator outlet by reason of its engagement with the lug 8 and even if it were not any turning movement of the smoke pipe 15 would have no effect upon the weighted damper lever 12 so as to interfere with its free movement to open the damper when the fire door of the furnace is opened. When the damper is moved to horizontal position there is a free passage of heavy smoke and other products of combustion through the flue 5 past the damper and directly through the' outlet 6 to the smoke pipe or Hue 15. And with the closing of the lire door there is an automatic turning of the damper to its vertical operative position causing the products of combustion to pass through the Hue 5, traverse the radiator through the entire length thereof and thence pass to the outlet with no obstruction in the outlet and no check on the draft by reason of any opening through the smoke pipe for the passage of the damper opening weighted lever. The in vention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

We claim:

1. In a device of the character described, a hollow body member, an outlet extending at about right angles therefrom, said outlet having a protuberance on its outer surface, a rod extending through said protuberance and into the interior of the hollow body member, said rod being revolubly mounted and being substantially parallel to the axis of the said outlet, regulating means located in said hollow body member, said regulating means being operated by the said rod, means for turning said rod about its axis, said protuberance being hollow and opening into said outlet whereby the rod has double bearing therein and whereby gases passing through the inner bearing from within Athe hollow body member will emerge into the said outlet.

2. In a device of the character described, a hollow body member, an outlet extending at about right angles therefrom, a said outlet having a protuberance in its outer surface, a movable element extending through said protuberanee and into the interior of the hollow body member, said movable element having tures.

OSCAR P. NYSTROM. GERRIT JAARDA. 

